At runtime I am getting the following error: Assertion failed: line_length > first_column_width, file libs\program_options\src\options_description.cpp, line 460 It's due to a quite long default value (path to file) ("input-baf" , po::valuestd::string()->default_value(filename),"\t baf file to process") Is there a way to increase first_column_width? Thanks in advance. -- Witold Eryk Wolski Heidmark str 5 D-28329 Bremen tel.: 04215261837